---
id: "CVE-2026-98676"
kind: "vulnerability"
aliases: ["CVE-2026-98676"]
title: "Linux kernel: ADE9000 driver crashes on probe with external clock"
severity: "low"
cvss: null
epss: null
exploited: false
status: "open"
category: "infrastructure"
products: []
ecosystems: []
tags: ["ade9000", "iio", "infrastructure", "linux-kernel"]
not_affected_if: ["internal-clock", "no-ade9000-hardware"]
published_at: "2026-10-18T16:17:20+00:00"
first_seen_at: "2026-10-23T21:57:16+00:00"
updated_at: "2026-10-25T05:19:17+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-98676", "first_seen_at": "2026-10-23T21:57:16+00:00"}]
---

# Linux kernel: ADE9000 driver crashes on probe with external clock

A Linux kernel IIO driver for the ADE9000 energy-measurement chip passes a NULL register address when registering a clock divider, so probing the device as a clock provider with an external input clock dereferences NULL and crashes. The sources describe a kernel crash (denial of service) during driver probe, not code execution.

_Summary, check and fix written by a model from the sources; labelled as such._

## Timeline

- 2026-10-23T21:57:16+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-98676

## From the sources

In the Linux kernel, the following vulnerability has been resolved:

iio: adc: ade9000: fix NULL pointer dereference in clkout registration

ade9000_setup_clkout() passes NULL as the register address when
registering a divider clock. During clock registration, the common
clock framework calls clk_divider_recalc_rate(), which dereferences
the address through readl(). As a result, probing an ADE9000 configured
as a clock provider with an external input clock crashes.

CLKOUT passes CLKIN through without changing its rate. Register it as
a 1:1 fixed-factor clock, which does not require register access.

This change does not affect the configuration using the internal clock,
for which the driver does not register a clock provider.

---

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